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Variation Characteristics of Stress Wave Speed for Anchorage System Under Instantaneous Excitation

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Abstract

Dynamic nondestructive testing is widely used to evaluate the bolt anchorage quality in an anchorage system. The consolidating wave speed, stress wave speed for anchorage system under instantaneous excitation, is a required parameter for the evaluation. However, it is very difficult to determine the wave speed since it is affected by many factors. In order to solve the problem, this paper tries to establish the relationships between consolidation wave speed and wave speed in anchorage medium. This paper used dynamic nondestructive testing for measuring consolidation wave speed and wave speed in anchorage medium through experiment. The consolidation wave speed is measured by the grouted bolts in concrete fabricated by casting the bolts within one cubic concrete block with the dimensions of (600 mm × 600 mm × 2400 mm) around steel bars, and the wave speed in anchorage medium is measured by concrete specimens. The results indicate that the consolidation wave speed ranges from wave speed in concrete to that in free steel bar, the consolidation wave speed and wave speed in concrete vary in exponential law, and that they are mutually symmetric. This proposes the new idea that wave speed in anchorage medium can be used to calculate consolidation wave speed, and this can make the evaluation of anchorage quality much easier and more accurate because the testing of wave speed in anchorage medium is well developed and reliable and it can be determined by only testing on standard cubic specimens (150 mm × 150 mm × 150 mm).

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Acknowledgments

The authors would like to acknowledge the support of the National Natural Science Foundation of China (NO.51204098), the Scientific Research Fund of the Natural Science Foundation of Hunan Province of China (NO.11JJ6045), the Hunan Provincial Education Department of China (NO.09C854). The authors are also grateful to the support provided by the Construction Program of the Key Discipline in Hunan Province and the Construction Program of the 12th Five-Year Guideline Research Platform (NHCXTD12) in Hunan Province.

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Authors and Affiliations

  1. Institute of Urban Construction, University of South China, Hengyang, China

    Bing Sun & Shanshan Guo

  2. School of Nuclear Resources Engineering, University of South China, Hengyang, China

    Sheng Zeng

  3. Centre for Geotechnical and Materials Modelling, The University of Newcastle, Newcastle, NSW, 2308, Australia

    Chao Yang

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  1. Bing Sun
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  2. Sheng Zeng
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  3. Shanshan Guo
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  4. Chao Yang
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Correspondence to Sheng Zeng.

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Sun, B., Zeng, S., Guo, S. et al. Variation Characteristics of Stress Wave Speed for Anchorage System Under Instantaneous Excitation. Geotech Geol Eng 33, 751–757 (2015). https://doi.org/10.1007/s10706-015-9846-z

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  • DOI: https://doi.org/10.1007/s10706-015-9846-z

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